I also have a US Lite with a G-26 and the nose chopped off. My G-26 is stock right down to the muffler and it runs flawless in any attitude with out any mods. One thing I would suggest though is if you have the tan colored carb block, (like in L48's pic above) they have been known to crack and leak. No amount of tuning or mods will mask a airleak. I have the black bakelite one on my engine and it has been leak free.